$ git clone -n https://src.fedoraproject.org/rpms/rust-fallible_collections.git /var/lib/mock/f40-build-2324919-58794/root/chroot_tmpdir/scmroot/rust-fallible_collections
Cloning into '/var/lib/mock/f40-build-2324919-58794/root/chroot_tmpdir/scmroot/rust-fallible_collections'...
$ git fetch origin 52303fce672917d1c60a503b03df3cd9a03eee00:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-fallible_collections
 * [new ref]         52303fce672917d1c60a503b03df3cd9a03eee00 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52303fc Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild