$ git clone -n https://src.fedoraproject.org/rpms/perl-Text-CHM.git /var/lib/mock/f45-build-26933-620/root/chroot_tmpdir/scmroot/perl-Text-CHM
Cloning into '/var/lib/mock/f45-build-26933-620/root/chroot_tmpdir/scmroot/perl-Text-CHM'...
$ git fetch origin aa61f33e7a202afe7e124282d6d6917e2c8ad45b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Text-CHM
 * [new ref]         aa61f33e7a202afe7e124282d6d6917e2c8ad45b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa61f33 Perl 5.44 rebuild