$ git clone -n https://src.fedoraproject.org/rpms/perl-Syntax-Keyword-Junction.git /var/lib/mock/f45-build-26388-617/root/chroot_tmpdir/scmroot/perl-Syntax-Keyword-Junction
Cloning into '/var/lib/mock/f45-build-26388-617/root/chroot_tmpdir/scmroot/perl-Syntax-Keyword-Junction'...
$ git fetch origin ba19f85477364c16ec856a21d2584e476909ad56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Syntax-Keyword-Junction
 * [new ref]         ba19f85477364c16ec856a21d2584e476909ad56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba19f85 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild