$ git clone -n https://src.fedoraproject.org/rpms/perl-BSD-Resource.git /var/lib/mock/f45-build-21876-588/root/chroot_tmpdir/scmroot/perl-BSD-Resource
Cloning into '/var/lib/mock/f45-build-21876-588/root/chroot_tmpdir/scmroot/perl-BSD-Resource'...
$ git fetch origin eccd7b1ac9b43643f9d2f5d85e58fafd5184ea76:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-BSD-Resource
 * [new ref]         eccd7b1ac9b43643f9d2f5d85e58fafd5184ea76 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eccd7b1 Perl 5.44 rebuild