$ git clone -n https://src.fedoraproject.org/rpms/perl-Text-VCardFast.git /var/lib/mock/f45-build-27172-621/root/chroot_tmpdir/scmroot/perl-Text-VCardFast
Cloning into '/var/lib/mock/f45-build-27172-621/root/chroot_tmpdir/scmroot/perl-Text-VCardFast'...
$ git fetch origin 1b7a842e6d571b6df896483df2c65e85207672d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Text-VCardFast
 * [new ref]         1b7a842e6d571b6df896483df2c65e85207672d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1b7a842 Perl 5.44 rebuild