$ git clone -n https://src.fedoraproject.org/rpms/overgod.git /var/lib/mock/f41-build-1045873-19069/root/chroot_tmpdir/scmroot/overgod
Cloning into '/var/lib/mock/f41-build-1045873-19069/root/chroot_tmpdir/scmroot/overgod'...
$ git fetch origin d616f8130c8a73343a8f753ef12b4dafa6cd4976:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/overgod
 * [new ref]         d616f8130c8a73343a8f753ef12b4dafa6cd4976 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d616f81 Eliminate use of obsolete %patchN syntax (#2283636)