$ git clone -n https://src.fedoraproject.org/rpms/kf5-kxmlgui.git /var/lib/mock/f40-build-2165739-50976/root/chroot_tmpdir/scmroot/kf5-kxmlgui
Cloning into '/var/lib/mock/f40-build-2165739-50976/root/chroot_tmpdir/scmroot/kf5-kxmlgui'...
$ git fetch origin cc351dd0f0f100d5b8f422a293c7ef93ff613c63:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kxmlgui
 * [new ref]         cc351dd0f0f100d5b8f422a293c7ef93ff613c63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc351dd 5.113.0