$ git clone -n https://src.fedoraproject.org/rpms/psfex.git /var/lib/mock/f40-build-796420-140692/root/chroot_tmpdir/scmroot/psfex
Cloning into '/var/lib/mock/f40-build-796420-140692/root/chroot_tmpdir/scmroot/psfex'...
$ git fetch origin 9e007b2d602688f4810320bfaa8fe2e2c80f4f5c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/psfex
 * [new ref]         9e007b2d602688f4810320bfaa8fe2e2c80f4f5c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e007b2 Fix FTBS in F35