$ git clone -n https://src.fedoraproject.org/rpms/rust-bpaf_derive.git /var/lib/mock/f42-build-side-1-3540416-46574/root/chroot_tmpdir/scmroot/rust-bpaf_derive
Cloning into '/var/lib/mock/f42-build-side-1-3540416-46574/root/chroot_tmpdir/scmroot/rust-bpaf_derive'...
$ git fetch origin 64d1688f095c705499279ad9c73827dc2545dcbb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bpaf_derive
 * [new ref]         64d1688f095c705499279ad9c73827dc2545dcbb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64d1688 Update to version 0.5.17; Fixes RHBZ#2342047