$ git clone -n https://src.fedoraproject.org/rpms/hydra.git /var/lib/mock/f40-build-805378-144767/root/chroot_tmpdir/scmroot/hydra
Cloning into '/var/lib/mock/f40-build-805378-144767/root/chroot_tmpdir/scmroot/hydra'...
$ git fetch origin 1cf98a48de94c51d1d8ff14009867bcd1140ca0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hydra
 * [new ref]         1cf98a48de94c51d1d8ff14009867bcd1140ca0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1cf98a4 Clean up SPEC file, fix build on Fedora 40+