$ git clone -n https://src.fedoraproject.org/rpms/rust-buffered-reader.git /var/lib/mock/f40-build-2639938-66383/root/chroot_tmpdir/scmroot/rust-buffered-reader
Cloning into '/var/lib/mock/f40-build-2639938-66383/root/chroot_tmpdir/scmroot/rust-buffered-reader'...
$ git fetch origin 742d13a4fcb6e39b5adcd1636d1eed4579b07db0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-buffered-reader
 * [new ref]         742d13a4fcb6e39b5adcd1636d1eed4579b07db0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 742d13a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild