$ git clone -n https://src.fedoraproject.org/rpms/libason.git /var/lib/mock/f45-build-15839-480/root/chroot_tmpdir/scmroot/libason
Cloning into '/var/lib/mock/f45-build-15839-480/root/chroot_tmpdir/scmroot/libason'...
$ git fetch origin b969cd8cb7faf2a0a0c47f1fc8e6b5c47d4580b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libason
 * [new ref]         b969cd8cb7faf2a0a0c47f1fc8e6b5c47d4580b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b969cd8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild