$ git clone -n https://src.fedoraproject.org/rpms/gprbuild.git /var/lib/mock/f40-build-2363335-60368/root/chroot_tmpdir/scmroot/gprbuild
Cloning into '/var/lib/mock/f40-build-2363335-60368/root/chroot_tmpdir/scmroot/gprbuild'...
$ git fetch origin 74e89ea3b9558bd5fbae21d26c6afd82903d9afa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gprbuild
 * [new ref]         74e89ea3b9558bd5fbae21d26c6afd82903d9afa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74e89ea Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild