$ git clone -n https://src.fedoraproject.org/rpms/rust-is-terminal.git /var/lib/mock/f40-build-2654529-66906/root/chroot_tmpdir/scmroot/rust-is-terminal
Cloning into '/var/lib/mock/f40-build-2654529-66906/root/chroot_tmpdir/scmroot/rust-is-terminal'...
$ git fetch origin 40cbc97268e6bca6c8f7527e4e0dee75e5ec1bdb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-is-terminal
 * [new ref]         40cbc97268e6bca6c8f7527e4e0dee75e5ec1bdb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 40cbc97 Update to version 0.4.12; Fixes RHBZ#2263451