$ git clone -n https://src.fedoraproject.org/rpms/rust-data-encoding-macro.git /var/lib/mock/f38-build-side-43-rust-devel-1397095-31052/root/chroot_tmpdir/scmroot/rust-data-encoding-macro
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1397095-31052/root/chroot_tmpdir/scmroot/rust-data-encoding-macro'...
$ git fetch origin b1ea3e27bc6cba444c804dbd526a5c7dce22c4ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-data-encoding-macro
 * [new ref]         b1ea3e27bc6cba444c804dbd526a5c7dce22c4ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1ea3e2 Update to version 0.1.13; Fixes RHBZ#2208773