$ git clone -n https://src.fedoraproject.org/rpms/rust-ascii.git /var/lib/mock/f45-build-40191-769/root/chroot_tmpdir/scmroot/rust-ascii
Cloning into '/var/lib/mock/f45-build-40191-769/root/chroot_tmpdir/scmroot/rust-ascii'...
$ git fetch origin 86f8ae46f874e16f41005096ff6e2d235379e5fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ascii
 * [new ref]         86f8ae46f874e16f41005096ff6e2d235379e5fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86f8ae4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild