$ git clone -n https://src.fedoraproject.org/rpms/varnish.git /var/lib/mock/f40-build-794894-139802/root/chroot_tmpdir/scmroot/varnish
Cloning into '/var/lib/mock/f40-build-794894-139802/root/chroot_tmpdir/scmroot/varnish'...
$ git fetch origin 2179badd5d30d8af04593d44bdc8430c56bd2fb4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/varnish
 * [new ref]         2179badd5d30d8af04593d44bdc8430c56bd2fb4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2179bad Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild