$ git clone -n https://src.fedoraproject.org/rpms/rust-cargo-config2.git /var/lib/mock/f40-build-2189910-51418/root/chroot_tmpdir/scmroot/rust-cargo-config2
Cloning into '/var/lib/mock/f40-build-2189910-51418/root/chroot_tmpdir/scmroot/rust-cargo-config2'...
$ git fetch origin f3d2ec6e0233a642a50332f1208ad1fb8e779bda:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cargo-config2
 * [new ref]         f3d2ec6e0233a642a50332f1208ad1fb8e779bda -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3d2ec6 Update to version 0.1.16