$ git clone -n https://src.fedoraproject.org/rpms/mupdf.git /var/lib/mock/f41-build-829642-156159/root/chroot_tmpdir/scmroot/mupdf
Cloning into '/var/lib/mock/f41-build-829642-156159/root/chroot_tmpdir/scmroot/mupdf'...
$ git fetch origin 51a10479a1fdcd4b803ff622d62eb3c2e62eef39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mupdf
 * [new ref]         51a10479a1fdcd4b803ff622d62eb3c2e62eef39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51a1047 Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild