$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtshadertools.git /var/lib/mock/f39-build-1566312-37588/root/chroot_tmpdir/scmroot/qt6-qtshadertools
Cloning into '/var/lib/mock/f39-build-1566312-37588/root/chroot_tmpdir/scmroot/qt6-qtshadertools'...
$ git fetch origin 5973cabafdcb31f9d5432a9b5fda198346d9fd28:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtshadertools
 * [new ref]         5973cabafdcb31f9d5432a9b5fda198346d9fd28 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5973cab 6.6.0