$ git clone -n https://src.fedoraproject.org/rpms/libcaca.git /var/lib/mock/f39-build-1531187-36207/root/chroot_tmpdir/scmroot/libcaca
Cloning into '/var/lib/mock/f39-build-1531187-36207/root/chroot_tmpdir/scmroot/libcaca'...
$ git fetch origin 8ca53b63c2d03ba64a89f049b213469927d87f9d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcaca
 * [new ref]         8ca53b63c2d03ba64a89f049b213469927d87f9d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ca53b6 Fix CVE-2022-0856 (RHBZ#2081750)