$ git clone -n https://src.fedoraproject.org/rpms/rust-pin-project-internal0.4.git /var/lib/mock/f38-build-side-43-rust-devel-1410490-31420/root/chroot_tmpdir/scmroot/rust-pin-project-internal0.4
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1410490-31420/root/chroot_tmpdir/scmroot/rust-pin-project-internal0.4'...
$ git fetch origin d8100162ae0391bf45c2e58b86d80d2b7257ff74:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pin-project-internal0.4
 * [new ref]         d8100162ae0391bf45c2e58b86d80d2b7257ff74 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d810016 Update to version 0.4.30