$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio-macros.git /var/lib/mock/f45-build-45458-823/root/chroot_tmpdir/scmroot/rust-tokio-macros
Cloning into '/var/lib/mock/f45-build-45458-823/root/chroot_tmpdir/scmroot/rust-tokio-macros'...
$ git fetch origin 81f430882eb515f83c292429fd9c12f2082ed633:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio-macros
 * [new ref]         81f430882eb515f83c292429fd9c12f2082ed633 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81f4308 Update to version 2.7.2; Fixes RHBZ#2520205