$ git clone -n https://src.fedoraproject.org/rpms/man-db.git /var/lib/mock/f41-build-1022313-18064/root/chroot_tmpdir/scmroot/man-db
Cloning into '/var/lib/mock/f41-build-1022313-18064/root/chroot_tmpdir/scmroot/man-db'...
$ git fetch origin 5bc523e8ce390eb2bcb5b611444fb2d01051353b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/man-db
 * [new ref]         5bc523e8ce390eb2bcb5b611444fb2d01051353b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5bc523e Add Packit configuration