$ git clone -n https://src.fedoraproject.org/rpms/rust-clearscreen.git /var/lib/mock/f42-build-side-1-3586030-46913/root/chroot_tmpdir/scmroot/rust-clearscreen
Cloning into '/var/lib/mock/f42-build-side-1-3586030-46913/root/chroot_tmpdir/scmroot/rust-clearscreen'...
$ git fetch origin e2a682e49bb3d1d9909f9801d8d53255b2751aba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-clearscreen
 * [new ref]         e2a682e49bb3d1d9909f9801d8d53255b2751aba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e2a682e Allow which 8