$ git clone -n https://src.fedoraproject.org/rpms/step.git /var/lib/mock/f40-build-2309246-57339/root/chroot_tmpdir/scmroot/step
Cloning into '/var/lib/mock/f40-build-2309246-57339/root/chroot_tmpdir/scmroot/step'...
$ git fetch origin 2f9c80a2bce1dd26b4979860e5b2c9929dafd7b8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/step
 * [new ref]         2f9c80a2bce1dd26b4979860e5b2c9929dafd7b8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f9c80a 24.01.90