$ git clone -n https://src.fedoraproject.org/rpms/kdelibs.git /var/lib/mock/f41-build-1021803-18037/root/chroot_tmpdir/scmroot/kdelibs
Cloning into '/var/lib/mock/f41-build-1021803-18037/root/chroot_tmpdir/scmroot/kdelibs'...
$ git fetch origin 86e0d98fca70af1f03ec6c60c597700cd48711a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kdelibs
 * [new ref]         86e0d98fca70af1f03ec6c60c597700cd48711a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86e0d98 Eliminate use of obsolete %patchN syntax (#2283636)