$ git clone -n https://src.fedoraproject.org/rpms/OpenSceneGraph.git /var/lib/mock/f39-build-1682113-41046/root/chroot_tmpdir/scmroot/OpenSceneGraph
Cloning into '/var/lib/mock/f39-build-1682113-41046/root/chroot_tmpdir/scmroot/OpenSceneGraph'...
$ git fetch origin b39626bd81ee0da29ca054717c0765a3b32eb1bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/OpenSceneGraph
 * [new ref]         b39626bd81ee0da29ca054717c0765a3b32eb1bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b39626b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild