$ git clone -n https://src.fedoraproject.org/rpms/rust-ppv-lite86.git /var/lib/mock/f41-build-side-1-3136907-39784/root/chroot_tmpdir/scmroot/rust-ppv-lite86
Cloning into '/var/lib/mock/f41-build-side-1-3136907-39784/root/chroot_tmpdir/scmroot/rust-ppv-lite86'...
$ git fetch origin 39781d9482d9b9fdcb2a29fce13c6c51d68ed4d5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ppv-lite86
 * [new ref]         39781d9482d9b9fdcb2a29fce13c6c51d68ed4d5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39781d9 Update to version 0.2.20; Fixes RHBZ#2301446