$ git clone -n https://src.fedoraproject.org/rpms/angelfish.git /var/lib/mock/f38-build-side-42-init-devel-697508-27034/root/chroot_tmpdir/scmroot/angelfish
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-697508-27034/root/chroot_tmpdir/scmroot/angelfish'...
$ git fetch origin 71cd506ed4759a216e9f30ac611c5fad4c78a8c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/angelfish
 * [new ref]         71cd506ed4759a216e9f30ac611c5fad4c78a8c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71cd506 Remove tarball