$ git clone -n https://src.fedoraproject.org/rpms/perl-Sub-Install.git /var/lib/mock/f45-build-26386-617/root/chroot_tmpdir/scmroot/perl-Sub-Install
Cloning into '/var/lib/mock/f45-build-26386-617/root/chroot_tmpdir/scmroot/perl-Sub-Install'...
$ git fetch origin d3522531290a99dc1c076e7641b35f8fc44aef57:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sub-Install
 * [new ref]         d3522531290a99dc1c076e7641b35f8fc44aef57 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d352253 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild