$ git clone -n https://src.fedoraproject.org/rpms/createrepo_c.git /var/lib/mock/f41-build-813503-148684/root/chroot_tmpdir/scmroot/createrepo_c
Cloning into '/var/lib/mock/f41-build-813503-148684/root/chroot_tmpdir/scmroot/createrepo_c'...
$ git fetch origin 8cf884b443e81bcf44fc1ec26a7107eaf3c673f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/createrepo_c
 * [new ref]         8cf884b443e81bcf44fc1ec26a7107eaf3c673f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8cf884b Update to 1.1.3