$ git clone -n https://src.fedoraproject.org/rpms/OliveTin.git /var/lib/mock/f41-build-775543-13521/root/chroot_tmpdir/scmroot/OliveTin
Cloning into '/var/lib/mock/f41-build-775543-13521/root/chroot_tmpdir/scmroot/OliveTin'...
$ git fetch origin 1a098f0d1fc4e40a097f849c0759bcafc03dc5e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/OliveTin
 * [new ref]         1a098f0d1fc4e40a097f849c0759bcafc03dc5e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a098f0 Remove uneeded webui cleanup