$ git clone -n https://src.fedoraproject.org/rpms/calf.git /var/lib/mock/f39-build-1596453-38375/root/chroot_tmpdir/scmroot/calf
Cloning into '/var/lib/mock/f39-build-1596453-38375/root/chroot_tmpdir/scmroot/calf'...
$ git fetch origin dd2f3a92b7ad9933cc7f90664190769594de53d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/calf
 * [new ref]         dd2f3a92b7ad9933cc7f90664190769594de53d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd2f3a9 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild