$ git clone -n https://src.fedoraproject.org/rpms/fernflower.git /var/lib/mock/f40-build-1996342-44004/root/chroot_tmpdir/scmroot/fernflower
Cloning into '/var/lib/mock/f40-build-1996342-44004/root/chroot_tmpdir/scmroot/fernflower'...
$ git fetch origin fd180cf228f917260537c180c420867a1ae338ca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fernflower
 * [new ref]         fd180cf228f917260537c180c420867a1ae338ca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd180cf Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild