$ git clone -n https://src.fedoraproject.org/rpms/kwin-x11.git /var/lib/mock/f40-build-1177339-21835/root/chroot_tmpdir/scmroot/kwin-x11
Cloning into '/var/lib/mock/f40-build-1177339-21835/root/chroot_tmpdir/scmroot/kwin-x11'...
$ git fetch origin 09abceffcbf2b2cf249e70b3bc696d286175f3e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwin-x11
 * [new ref]         09abceffcbf2b2cf249e70b3bc696d286175f3e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09abcef Update to 6.1.0.