$ git clone -n https://src.fedoraproject.org/rpms/botan2.git /var/lib/mock/f40-build-2283100-55576/root/chroot_tmpdir/scmroot/botan2
Cloning into '/var/lib/mock/f40-build-2283100-55576/root/chroot_tmpdir/scmroot/botan2'...
$ git fetch origin 36ebc8c756835bb93a284d4934f6a60f8dd15696:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/botan2
 * [new ref]         36ebc8c756835bb93a284d4934f6a60f8dd15696 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36ebc8c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild