$ git clone -n https://src.fedoraproject.org/rpms/perl-DepGen-Perl-Tests.git /var/lib/mock/f45-build-23064-595/root/chroot_tmpdir/scmroot/perl-DepGen-Perl-Tests
Cloning into '/var/lib/mock/f45-build-23064-595/root/chroot_tmpdir/scmroot/perl-DepGen-Perl-Tests'...
$ git fetch origin 2eea7430965d11edab29fa5db9372681c09f7e1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DepGen-Perl-Tests
 * [new ref]         2eea7430965d11edab29fa5db9372681c09f7e1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2eea743 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild