$ git clone -n https://src.fedoraproject.org/rpms/perl-DateTime-Format-ISO8601.git /var/lib/mock/f45-build-22945-595/root/chroot_tmpdir/scmroot/perl-DateTime-Format-ISO8601
Cloning into '/var/lib/mock/f45-build-22945-595/root/chroot_tmpdir/scmroot/perl-DateTime-Format-ISO8601'...
$ git fetch origin 21ad9f2d9592c3c6a7160b4a1929c0abfebaeb17:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DateTime-Format-ISO8601
 * [new ref]         21ad9f2d9592c3c6a7160b4a1929c0abfebaeb17 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21ad9f2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild