$ git clone -n https://src.fedoraproject.org/rpms/plasma-thunderbolt.git /var/lib/mock/f41-build-858057-168301/root/chroot_tmpdir/scmroot/plasma-thunderbolt
Cloning into '/var/lib/mock/f41-build-858057-168301/root/chroot_tmpdir/scmroot/plasma-thunderbolt'...
$ git fetch origin 14dee516b9d51f7bddaf7cc77eefa08e45fe7057:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-thunderbolt
 * [new ref]         14dee516b9d51f7bddaf7cc77eefa08e45fe7057 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14dee51 6.2.1