$ git clone -n https://src.fedoraproject.org/rpms/kwin.git /var/lib/mock/f40-build-1951127-25188/root/chroot_tmpdir/scmroot/kwin
Cloning into '/var/lib/mock/f40-build-1951127-25188/root/chroot_tmpdir/scmroot/kwin'...
$ git fetch origin ffe5e2db3dfc8f134366c8b582711199be1c3cfe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwin
 * [new ref]         ffe5e2db3dfc8f134366c8b582711199be1c3cfe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ffe5e2d Merge branch 'rawhide' into f40