$ git clone -n https://src.fedoraproject.org/rpms/qt5ct.git /var/lib/mock/f40-build-2637872-66262/root/chroot_tmpdir/scmroot/qt5ct
Cloning into '/var/lib/mock/f40-build-2637872-66262/root/chroot_tmpdir/scmroot/qt5ct'...
$ git fetch origin d3cbe494023a7d49ef0dd4006f8b3537e9a665cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5ct
 * [new ref]         d3cbe494023a7d49ef0dd4006f8b3537e9a665cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d3cbe49 Rebuild (qt5)