$ git clone -n https://src.fedoraproject.org/rpms/perl-mime-construct.git /var/lib/mock/f45-build-27712-625/root/chroot_tmpdir/scmroot/perl-mime-construct
Cloning into '/var/lib/mock/f45-build-27712-625/root/chroot_tmpdir/scmroot/perl-mime-construct'...
$ git fetch origin 36592257479d3878e7e7866dd14ceb8037a0e278:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-mime-construct
 * [new ref]         36592257479d3878e7e7866dd14ceb8037a0e278 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3659225 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild