$ git clone -n https://src.fedoraproject.org/rpms/kf6-qqc2-desktop-style.git /var/lib/mock/f41-build-838848-159865/root/chroot_tmpdir/scmroot/kf6-qqc2-desktop-style
Cloning into '/var/lib/mock/f41-build-838848-159865/root/chroot_tmpdir/scmroot/kf6-qqc2-desktop-style'...
$ git fetch origin b4643f7b1ff7d94357167a62dbfcc08202e0348a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-qqc2-desktop-style
 * [new ref]         b4643f7b1ff7d94357167a62dbfcc08202e0348a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4643f7 6.5.0