$ git clone -n https://src.fedoraproject.org/rpms/perl-Scalar-Does.git /var/lib/mock/f45-build-26175-616/root/chroot_tmpdir/scmroot/perl-Scalar-Does
Cloning into '/var/lib/mock/f45-build-26175-616/root/chroot_tmpdir/scmroot/perl-Scalar-Does'...
$ git fetch origin 1f44aaedb9ee5f5842be3bedda9eda2d827e338d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Scalar-Does
 * [new ref]         1f44aaedb9ee5f5842be3bedda9eda2d827e338d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f44aae Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild