$ git clone -n https://src.fedoraproject.org/rpms/rust-pin-project0.4.git /var/lib/mock/f38-build-side-43-rust-devel-1415366-31454/root/chroot_tmpdir/scmroot/rust-pin-project0.4
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1415366-31454/root/chroot_tmpdir/scmroot/rust-pin-project0.4'...
$ git fetch origin 4f08989624f8fb464b2caa6730e3489515c68816:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pin-project0.4
 * [new ref]         4f08989624f8fb464b2caa6730e3489515c68816 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f08989 Update to version 0.4.30