$ git clone -n https://src.fedoraproject.org/rpms/kblocks.git /var/lib/mock/f40-build-2185637-51289/root/chroot_tmpdir/scmroot/kblocks
Cloning into '/var/lib/mock/f40-build-2185637-51289/root/chroot_tmpdir/scmroot/kblocks'...
$ git fetch origin f3274c4084bedbff432ce8dd8bff9a651a1d0411:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kblocks
 * [new ref]         f3274c4084bedbff432ce8dd8bff9a651a1d0411 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3274c4 24.01.85