$ git clone -n https://src.fedoraproject.org/rpms/librhsm.git /var/lib/mock/f40-build-2008281-45359/root/chroot_tmpdir/scmroot/librhsm
Cloning into '/var/lib/mock/f40-build-2008281-45359/root/chroot_tmpdir/scmroot/librhsm'...
$ git fetch origin a26bbf941af85a6eb802d7400444c1c68f3c3409:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librhsm
 * [new ref]         a26bbf941af85a6eb802d7400444c1c68f3c3409 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a26bbf9 Correct a changelog entry