$ git clone -n https://src.fedoraproject.org/rpms/perl-Unix-Mknod.git /var/lib/mock/f45-build-27359-622/root/chroot_tmpdir/scmroot/perl-Unix-Mknod
Cloning into '/var/lib/mock/f45-build-27359-622/root/chroot_tmpdir/scmroot/perl-Unix-Mknod'...
$ git fetch origin 334b719f3aa14941b92b124b13b4176348830bd6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Unix-Mknod
 * [new ref]         334b719f3aa14941b92b124b13b4176348830bd6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 334b719 Perl 5.44 rebuild