$ git clone -n https://src.fedoraproject.org/rpms/qt5ct.git /var/lib/mock/f40-build-772383-126396/root/chroot_tmpdir/scmroot/qt5ct
Cloning into '/var/lib/mock/f40-build-772383-126396/root/chroot_tmpdir/scmroot/qt5ct'...
$ git fetch origin 745e6e0398a12077a05ae727a31b24ec3d22c033:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5ct
 * [new ref]         745e6e0398a12077a05ae727a31b24ec3d22c033 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 745e6e0 Rebuild (qt5)