$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtbase.git /var/lib/mock/eln-build-side-110866-59165225-6571417/root/chroot_tmpdir/scmroot/qt6-qtbase
Cloning into '/var/lib/mock/eln-build-side-110866-59165225-6571417/root/chroot_tmpdir/scmroot/qt6-qtbase'...
$ git fetch origin ba0d90717466ee62a972db3dc62dfb3abcc6a6e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtbase
 * [new ref]         ba0d90717466ee62a972db3dc62dfb3abcc6a6e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba0d907 Fix possible crash in FontConfig database