$ git clone -n https://src.fedoraproject.org/rpms/asnmap.git /var/lib/mock/f39-build-2200654-51773/root/chroot_tmpdir/scmroot/asnmap
Cloning into '/var/lib/mock/f39-build-2200654-51773/root/chroot_tmpdir/scmroot/asnmap'...
$ git fetch origin a5408db3a5736d4db229067a3b2f9e3af99bb800:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/asnmap
 * [new ref]         a5408db3a5736d4db229067a3b2f9e3af99bb800 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a5408db Added the README