$ git clone -n https://src.fedoraproject.org/rpms/btrfs-sxbackup.git /var/lib/mock/f40-build-1992022-43546/root/chroot_tmpdir/scmroot/btrfs-sxbackup
Cloning into '/var/lib/mock/f40-build-1992022-43546/root/chroot_tmpdir/scmroot/btrfs-sxbackup'...
$ git fetch origin 4bb99a4c60f6fec30a8fc0dc2219da1976027481:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/btrfs-sxbackup
 * [new ref]         4bb99a4c60f6fec30a8fc0dc2219da1976027481 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4bb99a4 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild