$ git clone -n https://src.fedoraproject.org/rpms/perl-DateTime-Format-W3CDTF.git /var/lib/mock/f45-build-22954-595/root/chroot_tmpdir/scmroot/perl-DateTime-Format-W3CDTF
Cloning into '/var/lib/mock/f45-build-22954-595/root/chroot_tmpdir/scmroot/perl-DateTime-Format-W3CDTF'...
$ git fetch origin ba87373c9386778a4d2e0eb3a4acacc0480de3c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DateTime-Format-W3CDTF
 * [new ref]         ba87373c9386778a4d2e0eb3a4acacc0480de3c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba87373 0.09 bump (rhbz#2510887)