$ git clone -n https://src.fedoraproject.org/rpms/sar2.git /var/lib/mock/f39-build-1466282-33657/root/chroot_tmpdir/scmroot/sar2
Cloning into '/var/lib/mock/f39-build-1466282-33657/root/chroot_tmpdir/scmroot/sar2'...
$ git fetch origin 45ddc43efde5d39908402b65ddad44b477ea22e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sar2
 * [new ref]         45ddc43efde5d39908402b65ddad44b477ea22e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45ddc43 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild