$ git clone -n https://src.fedoraproject.org/rpms/libgnome.git /var/lib/mock/f41-build-1178647-21860/root/chroot_tmpdir/scmroot/libgnome
Cloning into '/var/lib/mock/f41-build-1178647-21860/root/chroot_tmpdir/scmroot/libgnome'...
$ git fetch origin 473bab0b0218449e932b54520453c7804ce5058b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgnome
 * [new ref]         473bab0b0218449e932b54520453c7804ce5058b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 473bab0 Eliminate use of obsolete %patchN syntax (#2283636)