$ git clone -n https://src.fedoraproject.org/rpms/badchars.git /var/lib/mock/f39-build-1441919-32421/root/chroot_tmpdir/scmroot/badchars
Cloning into '/var/lib/mock/f39-build-1441919-32421/root/chroot_tmpdir/scmroot/badchars'...
$ git fetch origin ff1442b1830890d9106835368ac2eba8f61f13a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/badchars
 * [new ref]         ff1442b1830890d9106835368ac2eba8f61f13a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff1442b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild