$ git clone -n https://src.fedoraproject.org/rpms/tigervnc.git /var/lib/mock/f39-build-1536573-36329/root/chroot_tmpdir/scmroot/tigervnc
Cloning into '/var/lib/mock/f39-build-1536573-36329/root/chroot_tmpdir/scmroot/tigervnc'...
$ git fetch origin e84d11b7dad20f05d358a8da45e57bc299eddd97:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tigervnc
 * [new ref]         e84d11b7dad20f05d358a8da45e57bc299eddd97 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e84d11b Fix CVE-2023-5380 and CVE-2023-5367 (rebuild with fixed Xorg)