$ git clone -n https://src.fedoraproject.org/rpms/plasma-mobile.git /var/lib/mock/f42-build-870863-177408/root/chroot_tmpdir/scmroot/plasma-mobile
Cloning into '/var/lib/mock/f42-build-870863-177408/root/chroot_tmpdir/scmroot/plasma-mobile'...
$ git fetch origin cd8b942cbf1d4f29744db66af36cb04b034e146b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-mobile
 * [new ref]         cd8b942cbf1d4f29744db66af36cb04b034e146b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd8b942 6.3.0