$ git clone -n https://github.com/xcp-ng-rpms/sm /var/lib/mock/v8.3-u-gln1-11297-29630/root/chroot_tmpdir/scmroot/sm
Cloning into '/var/lib/mock/v8.3-u-gln1-11297-29630/root/chroot_tmpdir/scmroot/sm'...
$ git fetch origin c18d06e79fe5578bb5d0791c1db9bcbd1945641d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/sm
 * [new ref]         c18d06e79fe5578bb5d0791c1db9bcbd1945641d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c18d06e bump release for test build