$ git clone -n https://src.fedoraproject.org/rpms/gtk2-engines.git /var/lib/mock/f41-build-778293-13541/root/chroot_tmpdir/scmroot/gtk2-engines
Cloning into '/var/lib/mock/f41-build-778293-13541/root/chroot_tmpdir/scmroot/gtk2-engines'...
$ git fetch origin 3ff54ca1439f51d63f35ac8246e990ac6115ec86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtk2-engines
 * [new ref]         3ff54ca1439f51d63f35ac8246e990ac6115ec86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ff54ca Eliminate use of obsolete %patchN syntax (#2283636)