$ git clone -n https://src.fedoraproject.org/rpms/perl-ExtUtils-Config.git /var/lib/mock/f45-build-23359-597/root/chroot_tmpdir/scmroot/perl-ExtUtils-Config
Cloning into '/var/lib/mock/f45-build-23359-597/root/chroot_tmpdir/scmroot/perl-ExtUtils-Config'...
$ git fetch origin 93a659637d49a53820f19f1ca8c5e2fa48dceecd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-ExtUtils-Config
 * [new ref]         93a659637d49a53820f19f1ca8c5e2fa48dceecd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 93a6596 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild