$ git clone -n https://src.fedoraproject.org/rpms/signon-ui.git /var/lib/mock/f40-build-794746-139784/root/chroot_tmpdir/scmroot/signon-ui
Cloning into '/var/lib/mock/f40-build-794746-139784/root/chroot_tmpdir/scmroot/signon-ui'...
$ git fetch origin 3b5618e342270ed7598a6b45fb128c75455033e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/signon-ui
 * [new ref]         3b5618e342270ed7598a6b45fb128c75455033e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b5618e Update to git snapshot for qt6