$ git clone -n https://src.fedoraproject.org/rpms/rust-remain.git /var/lib/mock/f45-build-44382-813/root/chroot_tmpdir/scmroot/rust-remain
Cloning into '/var/lib/mock/f45-build-44382-813/root/chroot_tmpdir/scmroot/rust-remain'...
$ git fetch origin 7c25a2d97dcc4271db71eb430bd19cb5c4eee419:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-remain
 * [new ref]         7c25a2d97dcc4271db71eb430bd19cb5c4eee419 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c25a2d Update to version 0.2.16; Fixes RHBZ#2502113