$ git clone -n https://src.fedoraproject.org/rpms/cockpit.git /var/lib/mock/f40-build-2283695-55603/root/chroot_tmpdir/scmroot/cockpit
Cloning into '/var/lib/mock/f40-build-2283695-55603/root/chroot_tmpdir/scmroot/cockpit'...
$ git fetch origin c29f6238970065f22ce5185e5b165cf936a6da90:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cockpit
 * [new ref]         c29f6238970065f22ce5185e5b165cf936a6da90 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c29f623 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild