$ git clone -n https://src.fedoraproject.org/rpms/plasma-mobile.git /var/lib/mock/f40-build-2677115-67882/root/chroot_tmpdir/scmroot/plasma-mobile
Cloning into '/var/lib/mock/f40-build-2677115-67882/root/chroot_tmpdir/scmroot/plasma-mobile'...
$ git fetch origin 42cb31392225b15f855f34ea37e4da950da9e368:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-mobile
 * [new ref]         42cb31392225b15f855f34ea37e4da950da9e368 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42cb313 Fixed an issue with runtime requirement versioning