$ git clone -n https://src.fedoraproject.org/rpms/rust-asn1-rs.git /var/lib/mock/f45-build-40190-769/root/chroot_tmpdir/scmroot/rust-asn1-rs
Cloning into '/var/lib/mock/f45-build-40190-769/root/chroot_tmpdir/scmroot/rust-asn1-rs'...
$ git fetch origin 435fc4a748d506434cc8d3701f57c4619aff1daa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-asn1-rs
 * [new ref]         435fc4a748d506434cc8d3701f57c4619aff1daa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 435fc4a Update to version 0.7.2; Fixes RHBZ#2479541