$ git clone -n https://src.fedoraproject.org/rpms/texlive-base.git /var/lib/mock/f40-build-1511994-23908/root/chroot_tmpdir/scmroot/texlive-base
Cloning into '/var/lib/mock/f40-build-1511994-23908/root/chroot_tmpdir/scmroot/texlive-base'...
$ git fetch origin 6bc87d81dcd85c4c6376032fcf9bacf8068a7902:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/texlive-base
 * [new ref]         6bc87d81dcd85c4c6376032fcf9bacf8068a7902 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6bc87d8 apply fix for context mtxrun.lua (bz2279243), add versioned Fedora banner