$ git clone -n https://src.fedoraproject.org/rpms/rust-terminal-light.git /var/lib/mock/f42-build-side-1-3533282-46361/root/chroot_tmpdir/scmroot/rust-terminal-light
Cloning into '/var/lib/mock/f42-build-side-1-3533282-46361/root/chroot_tmpdir/scmroot/rust-terminal-light'...
$ git fetch origin b608bf219a5fa9a6471a8a6084e22acb7e6e8f41:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-terminal-light
 * [new ref]         b608bf219a5fa9a6471a8a6084e22acb7e6e8f41 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b608bf2 Update to version 1.8.0; Fixes RHBZ#2365350