$ git clone -n https://src.fedoraproject.org/rpms/perl-Convert-Age.git /var/lib/mock/f45-build-22565-593/root/chroot_tmpdir/scmroot/perl-Convert-Age
Cloning into '/var/lib/mock/f45-build-22565-593/root/chroot_tmpdir/scmroot/perl-Convert-Age'...
$ git fetch origin a708ce11718b80d648439a01c27391b6d48817d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Convert-Age
 * [new ref]         a708ce11718b80d648439a01c27391b6d48817d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a708ce1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild