$ git clone -n https://src.fedoraproject.org/rpms/qgis.git /var/lib/mock/f40-build-2711637-71872/root/chroot_tmpdir/scmroot/qgis
Cloning into '/var/lib/mock/f40-build-2711637-71872/root/chroot_tmpdir/scmroot/qgis'...
$ git fetch origin 09b634bf495cd34c53c9d0161b2b250fc349c137:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qgis
 * [new ref]         09b634bf495cd34c53c9d0161b2b250fc349c137 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09b634b Update to 3.34.5