$ git clone -n https://src.fedoraproject.org/rpms/koko.git /var/lib/mock/f42-build-side-1-3533241-46361/root/chroot_tmpdir/scmroot/koko
Cloning into '/var/lib/mock/f42-build-side-1-3533241-46361/root/chroot_tmpdir/scmroot/koko'...
$ git fetch origin cdd43f884042f083d3055d75a414465d7ab0dd8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/koko
 * [new ref]         cdd43f884042f083d3055d75a414465d7ab0dd8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cdd43f8 25.04.1