$ git clone -n https://src.fedoraproject.org/rpms/rust-env_logger.git /var/lib/mock/f38-build-side-43-rust-devel-1414154-31447/root/chroot_tmpdir/scmroot/rust-env_logger
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1414154-31447/root/chroot_tmpdir/scmroot/rust-env_logger'...
$ git fetch origin f6195f1ec2175e8a356aba4b30a24604b924f4c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-env_logger
 * [new ref]         f6195f1ec2175e8a356aba4b30a24604b924f4c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6195f1 Update to version 0.10.0; Fixes RHBZ#2148278