$ git clone -n https://src.fedoraproject.org/rpms/qqc2-breeze-style.git /var/lib/mock/f40-build-2496710-61664/root/chroot_tmpdir/scmroot/qqc2-breeze-style
Cloning into '/var/lib/mock/f40-build-2496710-61664/root/chroot_tmpdir/scmroot/qqc2-breeze-style'...
$ git fetch origin 646c29218b5878c88428f1167d421a91c7f76cdb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qqc2-breeze-style
 * [new ref]         646c29218b5878c88428f1167d421a91c7f76cdb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 646c292 6.0.0