$ git clone -n https://src.fedoraproject.org/rpms/plasma-integration.git /var/lib/mock/f41-build-824384-154063/root/chroot_tmpdir/scmroot/plasma-integration
Cloning into '/var/lib/mock/f41-build-824384-154063/root/chroot_tmpdir/scmroot/plasma-integration'...
$ git fetch origin 57da61479b8b9a13b4d76cbfa66598d558992a40:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-integration
 * [new ref]         57da61479b8b9a13b4d76cbfa66598d558992a40 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57da614 rebuild