$ git clone -n https://src.fedoraproject.org/rpms/botan2.git /var/lib/mock/f40-build-2336031-59418/root/chroot_tmpdir/scmroot/botan2
Cloning into '/var/lib/mock/f40-build-2336031-59418/root/chroot_tmpdir/scmroot/botan2'...
$ git fetch origin bb528281479f0b8529659ab1d8b3e75a2b670dea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/botan2
 * [new ref]         bb528281479f0b8529659ab1d8b3e75a2b670dea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb52828 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild