$ git clone -n https://src.fedoraproject.org/rpms/nemo.git /var/lib/mock/f41-build-side-1-2821445-33219/root/chroot_tmpdir/scmroot/nemo
Cloning into '/var/lib/mock/f41-build-side-1-2821445-33219/root/chroot_tmpdir/scmroot/nemo'...
$ git fetch origin 9ac35d196127a15c948e0562ee5b1d8eb6138944:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nemo
 * [new ref]         9ac35d196127a15c948e0562ee5b1d8eb6138944 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ac35d1 fix