$ git clone -n https://src.fedoraproject.org/rpms/qt5ct.git /var/lib/mock/f41-build-side-1-2662757-28830/root/chroot_tmpdir/scmroot/qt5ct
Cloning into '/var/lib/mock/f41-build-side-1-2662757-28830/root/chroot_tmpdir/scmroot/qt5ct'...
$ git fetch origin 6b5eb5570c58beb90451b51ee2880b56c4361b1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5ct
 * [new ref]         6b5eb5570c58beb90451b51ee2880b56c4361b1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6b5eb55 Rebuild (qt5)