$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-httpfs.git /var/lib/mock/f40-build-2669315-67257/root/chroot_tmpdir/scmroot/golang-modernc-httpfs
Cloning into '/var/lib/mock/f40-build-2669315-67257/root/chroot_tmpdir/scmroot/golang-modernc-httpfs'...
$ git fetch origin 387464b8b794f8cce2bf90d2c641f06a33d738a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-httpfs
 * [new ref]         387464b8b794f8cce2bf90d2c641f06a33d738a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 387464b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild