$ git clone -n https://src.fedoraproject.org/rpms/rust-trybuild.git /var/lib/mock/f40-build-2328153-58867/root/chroot_tmpdir/scmroot/rust-trybuild
Cloning into '/var/lib/mock/f40-build-2328153-58867/root/chroot_tmpdir/scmroot/rust-trybuild'...
$ git fetch origin 6f2f3ac8889926228152f610db68e2aae38f7e73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-trybuild
 * [new ref]         6f2f3ac8889926228152f610db68e2aae38f7e73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f2f3ac Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild