$ git clone -n https://src.fedoraproject.org/rpms/firewalk.git /var/lib/mock/f42-build-3350081-45010/root/chroot_tmpdir/scmroot/firewalk
Cloning into '/var/lib/mock/f42-build-3350081-45010/root/chroot_tmpdir/scmroot/firewalk'...
$ git fetch origin 063f7586cc87ba4c7b9131b650fe238b9dabd87a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/firewalk
 * [new ref]         063f7586cc87ba4c7b9131b650fe238b9dabd87a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 063f758 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild