$ git clone -n https://src.fedoraproject.org/rpms/perl-Digest-CRC.git /var/lib/mock/f45-build-23140-596/root/chroot_tmpdir/scmroot/perl-Digest-CRC
Cloning into '/var/lib/mock/f45-build-23140-596/root/chroot_tmpdir/scmroot/perl-Digest-CRC'...
$ git fetch origin 1fece85dfd55413b73cd69e118022670edce29b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Digest-CRC
 * [new ref]         1fece85dfd55413b73cd69e118022670edce29b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1fece85 Perl 5.44 rebuild