$ git clone -n https://github.com/xcp-ng-rpms/ssmtp.git /var/lib/mock/v8.3-u-pcoval2-10180-28767/root/chroot_tmpdir/scmroot/ssmtp
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10180-28767/root/chroot_tmpdir/scmroot/ssmtp'...
$ git fetch origin 92db8a343e3f19c6d84bccfd3dc20b513e6fe6b0:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/ssmtp
 * [new ref]         92db8a343e3f19c6d84bccfd3dc20b513e6fe6b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92db8a3 bump release for test build