$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-11417-29732/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-11417-29732/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 74c75e33a951c3eca98c849ec0596cfe5674aa82:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         74c75e33a951c3eca98c849ec0596cfe5674aa82 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74c75e3 bump release for test build