$ git clone -n https://src.fedoraproject.org/rpms/rust-mdbook-markdown.git /var/lib/mock/f45-build-43170-800/root/chroot_tmpdir/scmroot/rust-mdbook-markdown
Cloning into '/var/lib/mock/f45-build-43170-800/root/chroot_tmpdir/scmroot/rust-mdbook-markdown'...
$ git fetch origin c6f4e4b0e622a055868c5b9f2657494da7b5237c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-mdbook-markdown
 * [new ref]         c6f4e4b0e622a055868c5b9f2657494da7b5237c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6f4e4b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild