$ git clone -n https://src.fedoraproject.org/rpms/rust-toml.git /var/lib/mock/f41-build-side-1-2897352-34638/root/chroot_tmpdir/scmroot/rust-toml
Cloning into '/var/lib/mock/f41-build-side-1-2897352-34638/root/chroot_tmpdir/scmroot/rust-toml'...
$ git fetch origin cf30188a4ec05557240a43ae9bba0a77fdd26b2a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-toml
 * [new ref]         cf30188a4ec05557240a43ae9bba0a77fdd26b2a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf30188 Update to version 0.8.19; Fixes RHBZ#2298498