$ git clone -n https://src.fedoraproject.org/rpms/libgsf.git /var/lib/mock/f45-build-16298-484/root/chroot_tmpdir/scmroot/libgsf
Cloning into '/var/lib/mock/f45-build-16298-484/root/chroot_tmpdir/scmroot/libgsf'...
$ git fetch origin ef0eba8222e80e20d62b5bf19cbe7d4a432f6586:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgsf
 * [new ref]         ef0eba8222e80e20d62b5bf19cbe7d4a432f6586 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef0eba8 Update to 1.14.60