$ git clone -n https://src.fedoraproject.org/rpms/jsmath-fonts.git /var/lib/mock/f45-build-14525-461/root/chroot_tmpdir/scmroot/jsmath-fonts
Cloning into '/var/lib/mock/f45-build-14525-461/root/chroot_tmpdir/scmroot/jsmath-fonts'...
$ git fetch origin 1c01e5a31b9e96a2bc6c7f4be19183127e5a6ad1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jsmath-fonts
 * [new ref]         1c01e5a31b9e96a2bc6c7f4be19183127e5a6ad1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c01e5a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild