$ git clone -n https://src.fedoraproject.org/rpms/chromium.git /var/lib/mock/f40-build-752613-116812/root/chroot_tmpdir/scmroot/chromium
Cloning into '/var/lib/mock/f40-build-752613-116812/root/chroot_tmpdir/scmroot/chromium'...
$ git fetch origin 9dcb3fd811bb4313ac1d4b2d228acbf19958e982:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chromium
 * [new ref]         9dcb3fd811bb4313ac1d4b2d228acbf19958e982 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9dcb3fd * upstream security release:   - High CVE-2023-5997, use after free in Garbage Collection   - High CVE-2023-6112, use after free in Navigation