$ git clone -n https://src.fedoraproject.org/rpms/rust-toml.git /var/lib/mock/f42-build-side-1-3589252-46955/root/chroot_tmpdir/scmroot/rust-toml
Cloning into '/var/lib/mock/f42-build-side-1-3589252-46955/root/chroot_tmpdir/scmroot/rust-toml'...
$ git fetch origin 6cd6f9d910aa480be3e89d5c18a7055119cce659:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-toml
 * [new ref]         6cd6f9d910aa480be3e89d5c18a7055119cce659 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6cd6f9d Update to version 0.8.22; Fixes RHBZ#2362406