$ git clone -n https://src.fedoraproject.org/rpms/python-rust-update-set.git /var/lib/mock/f39-build-1737138-41289/root/chroot_tmpdir/scmroot/python-rust-update-set
Cloning into '/var/lib/mock/f39-build-1737138-41289/root/chroot_tmpdir/scmroot/python-rust-update-set'...
$ git fetch origin e0f4e8bb1fdbd019f53d4a960f2554ed974b90ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-rust-update-set
 * [new ref]         e0f4e8bb1fdbd019f53d4a960f2554ed974b90ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0f4e8b Add proposed patch to port from removed rust2rpm APIs to cargo2rpm