$ git clone -n https://src.fedoraproject.org/rpms/rust-pest.git /var/lib/mock/f42-build-side-1-3536536-46558/root/chroot_tmpdir/scmroot/rust-pest
Cloning into '/var/lib/mock/f42-build-side-1-3536536-46558/root/chroot_tmpdir/scmroot/rust-pest'...
$ git fetch origin 8cc346f48b67a72d713b711d811c26561ef498b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pest
 * [new ref]         8cc346f48b67a72d713b711d811c26561ef498b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8cc346f Update to version 2.8.0; Fixes RHBZ#2354771