$ git clone -n https://src.fedoraproject.org/rpms/rust-vte4.git /var/lib/mock/f41-build-side-1-3006316-36744/root/chroot_tmpdir/scmroot/rust-vte4
Cloning into '/var/lib/mock/f41-build-side-1-3006316-36744/root/chroot_tmpdir/scmroot/rust-vte4'...
$ git fetch origin b4bab07fc7a752a23f41542347d8e66a096be90f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vte4
 * [new ref]         b4bab07fc7a752a23f41542347d8e66a096be90f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4bab07 Update to 0.8.0