$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-psafont2-10454-29019/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-psafont2-10454-29019/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 735f92e3d6f5176c5b94282027b8a2482406e45d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         735f92e3d6f5176c5b94282027b8a2482406e45d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
Filtering content:  80% (4/5)
Filtering content: 100% (5/5)
Filtering content: 100% (5/5), 35.23 MiB | 27.37 MiB/s, done.
HEAD is now at 735f92e bump release for test build