$ git clone -n https://src.fedoraproject.org/rpms/rust-basic-toml.git /var/lib/mock/f38-build-side-42-init-devel-1222977-30639/root/chroot_tmpdir/scmroot/rust-basic-toml
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1222977-30639/root/chroot_tmpdir/scmroot/rust-basic-toml'...
$ git fetch origin c8dd68b1af039214b1c9b94b7952bcf5b48ed3e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-basic-toml
 * [new ref]         c8dd68b1af039214b1c9b94b7952bcf5b48ed3e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8dd68b Update to version 0.1.4; Fixes RHBZ#2223125