$ git clone -n https://src.fedoraproject.org/rpms/kdelibs.git /var/lib/mock/f40-build-2049000-49010/root/chroot_tmpdir/scmroot/kdelibs
Cloning into '/var/lib/mock/f40-build-2049000-49010/root/chroot_tmpdir/scmroot/kdelibs'...
$ git fetch origin b3f8f2ad95f33d57f9b5ed97ed8379faa7a1f003:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kdelibs
 * [new ref]         b3f8f2ad95f33d57f9b5ed97ed8379faa7a1f003 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b3f8f2a Fix build with libxml2 2.12.0