$ git clone -n https://src.fedoraproject.org/rpms/rust-pem1.git /var/lib/mock/f38-build-side-43-rust-devel-1418613-31459/root/chroot_tmpdir/scmroot/rust-pem1
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1418613-31459/root/chroot_tmpdir/scmroot/rust-pem1'...
$ git fetch origin 343d3c3af5dadf8c066fca4edb4036627ba688f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pem1
 * [new ref]         343d3c3af5dadf8c066fca4edb4036627ba688f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 343d3c3 Initial import (pem 1 compat package)