$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-psafont2-10450-29015/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-psafont2-10450-29015/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 0468cddf50f3fd8ef27c4e2ce346d406a05d7297:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         0468cddf50f3fd8ef27c4e2ce346d406a05d7297 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
Filtering content: 100% (2/2)
Filtering content: 100% (2/2), 14.06 MiB | 12.90 MiB/s, done.
HEAD is now at 0468cdd bump release for test build