$ git clone -n https://src.fedoraproject.org/rpms/rust-rust-embed-impl.git /var/lib/mock/f42-build-side-1-3536439-46558/root/chroot_tmpdir/scmroot/rust-rust-embed-impl
Cloning into '/var/lib/mock/f42-build-side-1-3536439-46558/root/chroot_tmpdir/scmroot/rust-rust-embed-impl'...
$ git fetch origin 7561200daaca9ca370726c4de90c9d0088926898:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rust-embed-impl
 * [new ref]         7561200daaca9ca370726c4de90c9d0088926898 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7561200 Update to version 8.7.0; Fixes RHBZ#2347541