$ git clone -n https://src.fedoraproject.org/rpms/qt-creator.git /var/lib/mock/f42-build-side-1-3500255-45970/root/chroot_tmpdir/scmroot/qt-creator
Cloning into '/var/lib/mock/f42-build-side-1-3500255-45970/root/chroot_tmpdir/scmroot/qt-creator'...
$ git fetch origin 799c12f5b8a1a9daaf4bbf08328f4d1100a5dd42:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt-creator
 * [new ref]         799c12f5b8a1a9daaf4bbf08328f4d1100a5dd42 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 799c12f Rebuild (qt6)