$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-psafont2-9719-28432/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-psafont2-9719-28432/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin f0e5f1e83c811128dbcc0a5aeba912ea39a401d2:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         f0e5f1e83c811128dbcc0a5aeba912ea39a401d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f0e5f1e bump release for test build