$ git clone -n https://src.fedoraproject.org/rpms/rust-i18n-embed-impl.git /var/lib/mock/f42-build-side-1-3585754-46907/root/chroot_tmpdir/scmroot/rust-i18n-embed-impl
Cloning into '/var/lib/mock/f42-build-side-1-3585754-46907/root/chroot_tmpdir/scmroot/rust-i18n-embed-impl'...
$ git fetch origin fb12cf21c170e4b76b71c2d8ceebc0d81666e2fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-i18n-embed-impl
 * [new ref]         fb12cf21c170e4b76b71c2d8ceebc0d81666e2fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb12cf2 Update to version 0.8.4; Fixes RHBZ#2321217