$ git clone -n https://src.fedoraproject.org/rpms/unuran.git /var/lib/mock/f45-build-46453-835/root/chroot_tmpdir/scmroot/unuran
Cloning into '/var/lib/mock/f45-build-46453-835/root/chroot_tmpdir/scmroot/unuran'...
$ git fetch origin ed9134731bf094220b16b7ada2db5560ad91c97e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unuran
 * [new ref]         ed9134731bf094220b16b7ada2db5560ad91c97e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed91347 Update to 1.12.0