$ git clone -n https://src.fedoraproject.org/rpms/nsnake.git /var/lib/mock/f45-build-19803-555/root/chroot_tmpdir/scmroot/nsnake
Cloning into '/var/lib/mock/f45-build-19803-555/root/chroot_tmpdir/scmroot/nsnake'...
$ git fetch origin 0413b06cde1d7dfb9579f24895c57a046f660931:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nsnake
 * [new ref]         0413b06cde1d7dfb9579f24895c57a046f660931 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0413b06 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild