$ git clone -n https://src.fedoraproject.org/rpms/kdecoration.git /var/lib/mock/f40-build-2048983-49010/root/chroot_tmpdir/scmroot/kdecoration
Cloning into '/var/lib/mock/f40-build-2048983-49010/root/chroot_tmpdir/scmroot/kdecoration'...
$ git fetch origin 378c4c5010c5c65c910d65f5958346fffff42e40:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kdecoration
 * [new ref]         378c4c5010c5c65c910d65f5958346fffff42e40 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 378c4c5 fix: upload missing sources