$ git clone -n https://src.fedoraproject.org/rpms/rust-reqwest.git /var/lib/mock/f41-build-side-1-3007614-36769/root/chroot_tmpdir/scmroot/rust-reqwest
Cloning into '/var/lib/mock/f41-build-side-1-3007614-36769/root/chroot_tmpdir/scmroot/rust-reqwest'...
$ git fetch origin 8cb81aa0fd48cf38dd307543c18323d33bfe7fd5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-reqwest
 * [new ref]         8cb81aa0fd48cf38dd307543c18323d33bfe7fd5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8cb81aa Update to version 0.12.8; Fixes RHBZ#2315736