$ git clone -n https://src.fedoraproject.org/rpms/rust-pyproject-toml.git /var/lib/mock/f40-build-2652049-66890/root/chroot_tmpdir/scmroot/rust-pyproject-toml
Cloning into '/var/lib/mock/f40-build-2652049-66890/root/chroot_tmpdir/scmroot/rust-pyproject-toml'...
$ git fetch origin 39c1cbd05f063404ae76d49fd80a20b708656f1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pyproject-toml
 * [new ref]         39c1cbd05f063404ae76d49fd80a20b708656f1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39c1cbd Revert breaking upstream change (pep440_rs v0.3 -> v0.4 update)