$ git clone -n https://src.fedoraproject.org/rpms/rust-alloc-no-stdlib.git /var/lib/mock/f40-build-2639581-66371/root/chroot_tmpdir/scmroot/rust-alloc-no-stdlib
Cloning into '/var/lib/mock/f40-build-2639581-66371/root/chroot_tmpdir/scmroot/rust-alloc-no-stdlib'...
$ git fetch origin 41ffd9f0e60cbf3f0be4b2ecb1ccb0445d0eb20b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-alloc-no-stdlib
 * [new ref]         41ffd9f0e60cbf3f0be4b2ecb1ccb0445d0eb20b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41ffd9f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild