$ git clone -n https://src.fedoraproject.org/rpms/gecode.git /var/lib/mock/f42-build-3272665-41307/root/chroot_tmpdir/scmroot/gecode
Cloning into '/var/lib/mock/f42-build-3272665-41307/root/chroot_tmpdir/scmroot/gecode'...
$ git fetch origin ac3a0b73a4f0fb4dac7ee676ade7e736ff01c0a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gecode
 * [new ref]         ac3a0b73a4f0fb4dac7ee676ade7e736ff01c0a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac3a0b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild