$ git clone -n https://src.fedoraproject.org/rpms/kwin.git /var/lib/mock/f40-build-2715910-72550/root/chroot_tmpdir/scmroot/kwin
Cloning into '/var/lib/mock/f40-build-2715910-72550/root/chroot_tmpdir/scmroot/kwin'...
$ git fetch origin 996aee5ccb05f5b571d3fc1f05d5d631e81d10b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwin
 * [new ref]         996aee5ccb05f5b571d3fc1f05d5d631e81d10b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 996aee5 Bump release