$ git clone -n https://src.fedoraproject.org/rpms/perl-Exception-Tiny.git /var/lib/mock/f45-build-23420-597/root/chroot_tmpdir/scmroot/perl-Exception-Tiny
Cloning into '/var/lib/mock/f45-build-23420-597/root/chroot_tmpdir/scmroot/perl-Exception-Tiny'...
$ git fetch origin 5eda6f7ff3b455d0a2cac12793c595214bedaaf1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Exception-Tiny
 * [new ref]         5eda6f7ff3b455d0a2cac12793c595214bedaaf1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5eda6f7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild