$ git clone -n https://src.fedoraproject.org/rpms/perl-Digest-SHA1.git /var/lib/mock/f45-build-23174-596/root/chroot_tmpdir/scmroot/perl-Digest-SHA1
Cloning into '/var/lib/mock/f45-build-23174-596/root/chroot_tmpdir/scmroot/perl-Digest-SHA1'...
$ git fetch origin 20b920252149e06fc3f4196fe566e005a80f90ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Digest-SHA1
 * [new ref]         20b920252149e06fc3f4196fe566e005a80f90ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20b9202 Perl 5.44 rebuild