$ git clone -n https://src.fedoraproject.org/rpms/rust-rustcat.git /var/lib/mock/f39-build-2223138-52722/root/chroot_tmpdir/scmroot/rust-rustcat
Cloning into '/var/lib/mock/f39-build-2223138-52722/root/chroot_tmpdir/scmroot/rust-rustcat'...
$ git fetch origin 2e83fd3323c39574071e02494bc7ad1aefc97bac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustcat
 * [new ref]         2e83fd3323c39574071e02494bc7ad1aefc97bac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e83fd3 Bump rustyline dependency to 13