$ git clone -n https://src.fedoraproject.org/rpms/kdecoration.git /var/lib/mock/f42-build-3427227-45202/root/chroot_tmpdir/scmroot/kdecoration
Cloning into '/var/lib/mock/f42-build-3427227-45202/root/chroot_tmpdir/scmroot/kdecoration'...
$ git fetch origin 2981cd9a65a8f53c550be1eb7182e38e69e66b3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kdecoration
 * [new ref]         2981cd9a65a8f53c550be1eb7182e38e69e66b3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2981cd9 6.3.3