$ git clone -n https://src.fedoraproject.org/rpms/rust-ppmd-rust.git /var/lib/mock/f45-build-43984-809/root/chroot_tmpdir/scmroot/rust-ppmd-rust
Cloning into '/var/lib/mock/f45-build-43984-809/root/chroot_tmpdir/scmroot/rust-ppmd-rust'...
$ git fetch origin 12ce8e6225b28a9986e5882c2cda6c9047d8d43c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ppmd-rust
 * [new ref]         12ce8e6225b28a9986e5882c2cda6c9047d8d43c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12ce8e6 Update to version 1.5.0; Fixes RHBZ#2533232