$ git clone -n https://src.fedoraproject.org/rpms/rust-basic-toml.git /var/lib/mock/f40-build-2107898-50596/root/chroot_tmpdir/scmroot/rust-basic-toml
Cloning into '/var/lib/mock/f40-build-2107898-50596/root/chroot_tmpdir/scmroot/rust-basic-toml'...
$ git fetch origin 9f811b4d26282a33888b5dafde884e21b40e8588:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-basic-toml
 * [new ref]         9f811b4d26282a33888b5dafde884e21b40e8588 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f811b4 Update to version 0.1.7; Fixes RHBZ#2246261