$ git clone -n https://src.fedoraproject.org/rpms/rust-scroll_derive.git /var/lib/mock/f42-build-side-1-3536444-46558/root/chroot_tmpdir/scmroot/rust-scroll_derive
Cloning into '/var/lib/mock/f42-build-side-1-3536444-46558/root/chroot_tmpdir/scmroot/rust-scroll_derive'...
$ git fetch origin 3357ed33c948252ed375eadeebd748116d13b194:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-scroll_derive
 * [new ref]         3357ed33c948252ed375eadeebd748116d13b194 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3357ed3 Update to version 0.12.1; Fixes RHBZ#2357671