$ git clone -n https://src.fedoraproject.org/rpms/perl-BSSolv.git /var/lib/mock/f45-build-21849-588/root/chroot_tmpdir/scmroot/perl-BSSolv
Cloning into '/var/lib/mock/f45-build-21849-588/root/chroot_tmpdir/scmroot/perl-BSSolv'...
$ git fetch origin df831d8e9f76bb635ecbc52e5bba79708050db94:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-BSSolv
 * [new ref]         df831d8e9f76bb635ecbc52e5bba79708050db94 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df831d8 Perl 5.44 rebuild