$ git clone -n https://src.fedoraproject.org/rpms/python39-zstd-epel.git /var/lib/mock/f39-build-1950511-43212/root/chroot_tmpdir/scmroot/python39-zstd-epel
Cloning into '/var/lib/mock/f39-build-1950511-43212/root/chroot_tmpdir/scmroot/python39-zstd-epel'...
$ git fetch origin 9ab309f54a682fa517230d88814a10e64ef5e905:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python39-zstd-epel
 * [new ref]         9ab309f54a682fa517230d88814a10e64ef5e905 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ab309f EPEL8 only