$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v9.0-u-ydi1-11567-29874/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v9.0-u-ydi1-11567-29874/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 7c51a7d4078ac6c49eba66b9c4b382c5f60f37b3:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         7c51a7d4078ac6c49eba66b9c4b382c5f60f37b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c51a7d bump release for test build